SECTION II CALIBRATION - TB-9-6670-248-500003

TB-9-6670-248-50 Beam Indicating Scale AAA-S-118b Manual
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TB 9-6670-248-50

SECTION II

CALIBRATION

5. Equipment Required. Table 1 lists minimum use specifications of equipment

required for calibration performance checks and adjustments. Table 1 is provided to assist

in the selection of required equipment. For specific item identification refer to section III.

Table 1. Minimum Specifications of Equipment Required

Item

Minimum use

number.

Common name

specifications

WEIGHTS

RANGE: 0 to 110 lb

ACCURACY: 1.33 oz

WEIGHT SET

RANGE: 0 to 110 lb

ACCURACY: 1.33 oz

6. Preliminary Procedure

NOTE

Personnel should familiarize themselves with the entire

bulletin prior to performing calibration.

a. Place the UUT on a clean flat level surface.

b. Check that counterpoise weight hook (fig. 1) is installed at end of beam (fig. 1) of

UUT.

NOTE

UUT type III style 3 does not have a counterpoise weight hook.

c. Check that trig loop lock (fig. 1) is in the unlocked position.

d. With the poise (fig. 1) set on zero, check that beam is balanced. If necessary, rotate

zero balance control (fig. 1) clockwise or counterclockwise as required to balance the beam.

NOTE

When the UUT is not within tolerance, the deficiency must be

corrected before continuing with the procedure.

7. Beam and Counterpoise Weights

a. Performance Check

(1) Place 10-pound weight from weight set (A2, table 1) in center of platform of

UUT.